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A. Very Short Answer Questions . 1.Which two cell organelles have their own genetic material? 2.What is the function of cellulose in a plant cell? 3. When are chromosomes visible in the ucleus? 4. Name the different types of endoplusmic reticulm. 5. The inner membrane of mitochondria is dceply folded. Explain. 6. Name the powerhouse of the cell. 7. Write one important function of cell wal. 8. The plasa membrane of a cell is selectively permeable. Give reason. 9 Which two nucleie acids are present in the cell? 10. What is the diflerence between cell membrane and cell wall ? |
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Answer» The two organelles containing their own genetic material are mitochondria and plastids.Cellulose, a TOUGH, fibrous, and water-insoluble polysaccharide, plays an integral role in keeping the structure of plant cell walls stable. During interphase (1), chromatin is in its least condensed state and appears loosely distributed throughout the NUCLEUS. Chromatin condensation begins during prophase (2) and chromosomes BECOME visible.The ER can be classified in two functionally distinct forms: smooth endoplasmic RETICULUM (SER) and rough endoplasmic reticulum (RER). The morphological distinction between the two is the presence of protein-synthesizing particles, called ribosomes, attached to the outer surface of the RER.The inner membrane of Mitochondria is deeply folded to create a large surface area for chemical reactions of oxidative phosphorylation, i.e. the process of converting food sugars into energy (ATP) to take place. |
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